VIM flags an exception when an invoice fails a validation rule: a price variance, quantity mismatch, missing goods receipt, vendor master discrepancy, duplicate suspicion, or tax problem. Each exception routes to a resolver based on configurable rules tied to the exception type, amount, vendor, or organizational unit. Resolvers work from personal and team inboxes with the invoice image, the relevant SAP data, the process history, and the allowed actions on one screen, and AP supervisors can open other users' queues, recall approvals, or restart a process when work stalls.
Three lessons from our delivery experience shape how well this works. First, system exceptions and business exceptions need different treatment: a failed extraction or master-data lookup gets fixed in data or configuration, while a price or quantity dispute needs a decision from whoever owns the issue, often Procurement, Receiving, Tax, or a business approver rather than AP. Second, exception rules need deliberate ordering, because the sequence in which rules fire determines who sees the invoice first and how often it bounces between teams. Missing-information checks should fire before dependent checks, and price and quantity issues should resolve before balance checks, so one root cause does not generate three exceptions. Third, resist the urge to activate every available rule. A proportionate rule set covering the exceptions that actually occur keeps workflow volume manageable, and lasting reductions in exception rates come from root causes: capture training, master-data quality, and PO discipline, more than from working the queue faster.